Tailored Catalytic Nanoframes from Metal–Organic Frameworks by Anisotropic Surface Modification and Etching for the Hydrogen Evolution Reaction

Abstract

A facile anisotropic surface modification and etching strategy is presented for the synthesis of hollow structured ZIF‐67 nanoframes. The strategy uses structural and compositional distinctions between each crystallographic facet of truncated rhombic dodecahedrons ZIF‐67 (tZIF‐67 RDs) and the moderate coordinating and etching effects of cyanuric acid (CA). The CA can anisotropically modify and protect the {110} facets from etching, causing the six {100} facets be selectively etched via an inside‐out manner, and finally forming the hollow nanoframes. The surface‐modified hollow tZIF‐67 RDs can be facet‐selectively etched by metal salts in an outside‐in manner to give metal‐doped tZIF‐67 nanoframes. After calcination, the metal‐tZIF‐67 hybrids are converted into metal‐Co alloy/C composite catalysts with hollow nanoframed structures. The PtCo/C catalyst with only 5.9 wt % Pt exhibits high catalytic activities and stabilities in the hydrogen evolution reaction (HER) in acidic solutions.

Surface reconstructing hierarchical structures as robust sulfion oxidation catalysts to produce hydrogen with ultralow energy consumption

“…[1][2][3][4] Hydrogen (H 2 ), with its advantages of high energy density, zero-carbon emissions, and renewability, is regarded as one of the best future substitutes for fossil energy. [5][6][7][8][9] Meanwhile, electrolysis of water can be powered by renewable electric energy derived from clean sources such as solar and wind, providing a green and sustainable way to produce hydrogen. However, the sluggish overall water-splitting reaction (OWSR) with its low energy conversion efficiency limits large-scale commercial application.…”

Facile fabrication of polypyrrole/NiOx core‐shell nanocomposites for hydrogen production from wastewater

“…One of the most adaptable polymerics in the materials group, CPs are also lightweight and do not degrade 9 . Because of these exceptional properties, conducting polymers are now readily incorporated into the newest photocatalyst, sensor, for electrochemical, and hydrogen evolution reaction 10,11 . CPs exhibit excellent conductivity, like metals and semiconductors 12 .…”

Engineering NiMoP nanosheets on hollow Cu3P nanotube arrays as efficient electrocatalyst for hydrogen evolution reaction

“…In the past few years, a lot of research has being conducted to develop dual-functional electrocatalysts to enhance the catalytic performance of HER, 8,9 such as transition metal chalcogenides, 10,11 oxides, 12,13 phosphides, 14,15 nitrides, [16][17][18] etc. Transition metal phosphide (TMP) is another potential non-noble metal catalyst similar to transition metal sulde for HER.…”